reset issue with packed elf

[Bignaux Ronan]

tested elf : https://github.com/bignaux/helloworld

unpacked elf : reset works, cmdline is empty.
ps2client execee host:helloworld-UNC.elf
log :

[helloworld]    version: 403bd93
[helloworld]    cmdline: 
1..5
not ok 1 - running from ps2link
#   Failed test 'running from ps2link'
at helloworld.c line 55.
#          got: '(null)'
#     expected: 'host:helloworld.elf'

packed elf : reset doesn't work, cmdline is fine
ps2client execee host:helloworld.elf

[helloworld]    version: 403bd93
[helloworld]    cmdline: host:helloworld.elf
1..5
ok 1 - running from ps2link
open name rom0:ROMVER flag 1 data 41378
open fd = 2
[helloworld]    Hello, World fr00000m helloworld v.403bd93 !

a bit duplicate of ps2dev/ps2client#4 but want to have it there.